title: Effects of leptomycin B on the cell cycle of fibroblasts and fission yeast cells.
abstract: An antifungal antibiotic, leptomycin B (LMB), which induced cell elongation of fission yeast, Schizosaccharomyces pombe, was found to be a unique inhibitor of the cell cycle of mammalian and fission yeast cells. Proliferation of rat 3Y1 fibroblasts was reversibly blocked by LMB in both the G1 and G2 phases and the treated cells were presumably introduced into the resting state (GO). After removal of LMB, proliferative tetraploid cells were produced from the cells which had been arrested by LMB at the G2 phase, as a result of DNA replication without passage through the M phase. LMB also inhibited the proliferation of S. pombe in both the G1 and G2 phases. These results suggest that the molecular target of LMB is one of the components necessary for progression of both G1 and G2 in the eukaryotic cell cycle.
authors.affiliation: Department of Agricultural Chemistry, Faculty of Agriculture, The University of Tokyo, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Yoshida
authors.forename: M
authors.initials: M
authors.lastname: Nishikawa
authors.forename: K
authors.initials: K
authors.lastname: Nishi
authors.forename: K
authors.initials: K
authors.lastname: Abe
authors.forename: S
authors.initials: S
authors.lastname: Horinouchi
authors.forename: T
authors.initials: T
authors.lastname: Beppu
mesh_terms: D000818:Animals; D000903:Antibiotics, Antineoplastic / Q000494:pharmacology*; D002453:Cell Cycle / Q000187:drug effects*; D002455:Cell Division / Q000187:drug effects; D002460:Cell Line; D004247:DNA / Q000032:analysis; D004261:DNA Replication; D004271:DNA, Fungal / Q000032:analysis; D005231:Fatty Acids, Unsaturated / Q000494:pharmacology; D005347:Fibroblasts / Q000166:cytology / Q000187:drug effects; D007700:Kinetics; D051381:Rats; D004718:Saccharomycetales / Q000254:growth & development*; D012568:Schizosaccharomyces / Q000166:cytology / Q000187:drug effects / Q000254:growth & development*; D013997:Time Factors
chemical_list: D000903:Antibiotics, Antineoplastic; D004271:DNA, Fungal; D005231:Fatty Acids, Unsaturated; D004247:DNA; C038753:leptomycin B